You haven't had enough experience with old PC/home computer games without double buffering then. 
(
tons of 2D games with tearing, at least if you didn't have a fast enough machine)
That's nothing to do with v-sync though, but lack of double buffering with fast page flipping. (in some cases v-sync was still forced, but the machines didn't have the bandwidth to update the entire frame in v-blank and without double buffering in video RAM with fast page flipping, you were stuck -hence why most such games would have the problem solved with faster CPUs and video cards/buses -though for old home computers that weren't upgradable as such, you were a bit more stuck)
For machines that could ignore V-sync, most/all games that did that were only ones stuck with single buffering and developers chose to avoid screen tearing at the expense of some dropped frames whenever double buffering was possible.
Only recently did developers start actively choosing to ignore vsync as such.

(older PC games all forced it as well -until you go so far back as to not have double buffering)